From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Tue, 20 Jan 2015 14:10:34 +0000 (+0100)
Subject: 	* grub-core/disk/i386/pc/biosdisk.c: Check disk size sanity.
X-Git-Tag: 2.02-beta3~571
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4200ad44fe782193a397bd0f0ab72283a6d25e89;p=thirdparty%2Fgrub.git

	* grub-core/disk/i386/pc/biosdisk.c: Check disk size sanity.
---

diff --git a/ChangeLog b/ChangeLog
index bdd5697ab..e8c1d6870 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-01-20  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/disk/i386/pc/biosdisk.c: Check disk size sanity.
+
 2015-01-20  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/disk/ieee1275/nand.c (grub_nand_open): Check block size
diff --git a/grub-core/disk/i386/pc/biosdisk.c b/grub-core/disk/i386/pc/biosdisk.c
index 6b2152591..26a4973ad 100644
--- a/grub-core/disk/i386/pc/biosdisk.c
+++ b/grub-core/disk/i386/pc/biosdisk.c
@@ -419,6 +419,11 @@ grub_biosdisk_open (const char *name, grub_disk_t disk)
 	    }
         }
 
+      if (data->sectors == 0)
+	data->sectors = 63;
+      if (data->heads == 0)
+	data->heads = 255;
+
       if (! total_sectors)
         total_sectors = data->cylinders * data->heads * data->sectors;
     }